SCR Operation & Testing

[@TEAMPHHrollsUSD]

thank you so much. i was so confused in class. and this simple video just cleared everything up for basic electronics course. greetings from Peru.

[@electronicsNmore]

+Frank UHMW You're welcome Frank! Please be sure to share my videos with your friends, rate thumbs up, and share. Thank You

[@CovertCulvert]

Thank you, thank you, thank you! I finally found a video that I could follow to do the test I needed to do.

[@AShearer76]

Great video and explanation. Thanks for taking the time to put it together.

[@zx8401ztv]

Believe it or not, the bulb method is the way ive allways tested them, it never fails :-) Ive also used bigger bulbs to test the stability of larger current scr's when they heat up. Smashing video :-D

[@electronicsNmore]

+zx8401ztv Glad you liked the video!

[@shamanking5195]

what size resistor are you using ??? does have to be a 9 volts battery ??? Thanks

[@davidtaylor672]

So clearly explained! 👍👍

[@kenlow4028]

Really excellent instructor

[@Roadsurfer2k11]

Are these only to be tested removed off board out of circuit? Just documenting how to troubleshoot old pinball machines and 60 of these (mcr106-1 and 2n5060) are on one board alone. I notice 2 already were replaced by seeing different part manufacturers were soldered on. If I can check on board and won't mess anything up, do I need to do anything afterwards to close gate, if I understand that right..

[@electronicsNmore]

I would desolder the gate pin, then test using a DMM set to the diode function between the gate and each leg(Anode/Cathode).

[@alanerece4507]

Good step by step explanation!

[@electronicsNmore]

Thanks Alan! Be sure to rate thumbs up and share.

[@ayushtalati1354]

next level stuff

[@javierpasetti2947]

Impressive clarity. Well done.

[@electronicsNmore]

+Javier Pasetti Thanks Javier! Be sure to check out my other videos, rate thumbs up and share.

[@bobbailey8246]

Nice! You explain and demonstrate things so clearly :-)

[@electronicsNmore]

Bob Bailey I like to make things as easy to understand as possible. Thanks For Watching! Please share.

[@demontagemontage]

thank you

[@electronicsNmore]

You're welcome! Be sure to share. Thanks

[@n1kkri]

can you short the gate to the anode and use it as a diode? What is the current flowing through the gate? Is that why your using a resistor and what value did you use.

[@electronicsNmore]

You can use an SCR as a diode. The resistor was used to limit gate current, the value wasn't critical. Thanks for watching!

[@n1kkri]

@@electronicsNmore Thanks for your reply, I seem to remember doing this many years ago. I played around with different value resistors. In my case I had to get under 1000 ohms before the gate fired off and let the SCR pass current. I settled on a 560 ohm resistor. I am building a LiOn battery pack for a Ham Radio. I have 4 batteries in series each series is 3 batteries in parallel. I plan to use 3, 20 amp SCR in series to drop the voltage down to less than 15 volts for the radio. Ken

[@bobmccall6446]

Nice video! But what are the factors you need to consider when selecting an SCR for a particular circuit? Which SCR should you use?

[@electronicsNmore]

Thanks. The most important factor is the current rating.

[@nayakacreativity3639]

Why does the SCR have a larger voltage drop at Vac (anode-cathode) if it uses an AC voltage supply, rather than a DC voltage supply? Please reply thanks, I already subscribe your channel 👌

[@lowprofileneovvl6652]

Nice video men, can we also applied this method of testing for the high power thyristor such the hockey PUK type (ceramic)?

[@electronicsNmore]

As long as it's a 4 layer, 3 junction semiconductor, then yes.

[@mrtechie6810]

Electronic control of tankless water heater: Use a PID? SSR vs SCR? I have an 8KW Atmor tankless water heater that has two switched heating elements. I want to add stable electronic temperature control. But I can't find good information about the different options! Seems the PID + SSR MAY have longer switching time, and that MAY reduce heating element life from thermal cycling vs a higher speed SCR. But I am having trouble finding the real answer.

[@rafikk3697]

worth watching

[@CSSIandAssociate]

Thanks for posting. Another great vid.

[@electronicsNmore]

William Ward You're welcome!

[@maxdinsmore1109]

You should be a teacher. Great video

[@electronicsNmore]

Thanks! Glad you enjoyed the video. :-) I have many great videos on my channel covering many different subjects, so be sure to look over my extensive video playlists for other videos of interest to you and most importantly share.

[@roseelectronics4582]

He's already a teacher. That's what he deos here on youtube.

[@ElectronicsShow]

thank you ,please i need help regarding a BRY51 i found nothing about it ,can i replace it by cr02am thanks

[@Torsan1977]

I learned something today! What kind of devices have these in them? I'd like to keep a lookout while salvaging components. Thanks for the video!

[@electronicsNmore]

Torsan1977 DC motor control, DC switching, DC electronic circuit breakers, and AC control circuits such as dimmers. Thanks For Watching!

[@electronicsNmore]

SCR's are great for alarm circuits. I may have to design a good one when I get a chance. Thanks For Watching!

[@saarike]

Thanks a lot of this great video!

[@electronicsNmore]

Be sure to watch my other videos and share. Thanks!

[@saarike]

@@electronicsNmore I will. :)

[@lowprofileneovvl6652]

Is this method is the same also when testing a big thyristor (ceramic type) used in soft starter? thanks

[@electronicsNmore]

Works the same on all SCR's(trigger current may vary). In my Tankless Water Heater video, I show how to test Triacs. Thanks for watching!

[@deslomeslager]

Nice demo and explanation, thanks!

[@electronicsNmore]

deslomeslager You're Welcome

[@michealirewusi7902]

superb expalnation on SCR.

[@electronicsNmore]

Micheal Irewusi Thanks Michael!

[@ifeanyijudah6884]

I work with Variable speed drives and i have a faulty one here displaying 32 Volts out, when the drive is not powered on. Do you think it may be the SCRs ??

[@electronicsNmore]

Not sure without inspecting the VSD.

[@ifeanyijudah6884]

@@electronicsNmore i doubt it is after the last 24 hours. I changed the 6 IGBTs and 3 SCRs, but no improvement. We suspect it's a firmware issue.

[@gavinmcelroy1502]

if u want a super sensitive gate use the SCR2p4m it's gate is ultra sensitive i triggerd it using 0.13 volts

[@mitropoulosilias]

best video for the SCR

[@electronicsNmore]

mitropoulosilias Thank you! I have many excellent videos on this channel, be sure to check them out and share.

[@kiranshashiny]

Nice video ,Why did you have to use the resistor when connecting to the gate ?

[@electronicsNmore]

Shashi Kiran Limit the current.

[@buddha65281]

@@electronicsNmore , would you share the resistor value please.. great video... thx

[@sharifhossain8830]

SCR Model?

[@warunakumara7671]

what will happen when we touch the scrs gate for second time with positive voltage when scr is on

[@electronicsNmore]

Nothing, it will remain on.

[@nathanrice1796]

My problem is I can't find an SCR for the 12VDC application that I need it for. I need an SCR that can take a 12-15V gate trigger. The highest I can find is a 10V gate trigger SCR. I want to get by without using a resistor.

[@rowanguerra2428]

Nice video.

[@intellectracoon]

thank you for such a useful video .

[@electronicsNmore]

You're welcome!

[@ajayrathodar308]

What is interinsulated scr sir plz help me

[@buddhainkalyug9727]

What value resistor are you using during triggering of the gate??

[@electronicsNmore]

+NISARGH S If I did not mention the resistor value in the video, which I thought I did, then I probably used a 200 ohm. Thanks For Watching!

[@xzzx22]

Thanks this helped me alot.

[@electronicsNmore]

You're welcome! Be sure to check out my other videos, rate thumbs up, and share.

[@1badpete999]

What value of resistor your using for the test ?

[@electronicsNmore]

Not critical. Use 200 ohms and up.

[@1badpete999]

@@electronicsNmore Thanks it worked !

[@mananamin9210]

nice explained and good work 🤙😁

[@electronicsNmore]

Thanks!

[@buddhainkalyug9727]

can we use metal cap scr for this test instead of ic package type??

[@electronicsNmore]

+NISARGH S Should work fine on all SCR's regardless of the package. Be sure to rate thumbs up, and share my videos with others. Thank you!

[@buddhainkalyug9727]

awesome video

[@altafansari5458]

Name of scr???

[@dperez-tv1lr]

cool video

[@electronicsNmore]

Thanks Derrick! Be sure to check out my other videos and share.

[@pikaonyoutube2139]

how much did you pay for that meter and what brand thanks great demo and explaination with the scr

[@electronicsNmore]

hansley maharaj Thank You. The Wavetek-27xt is an excellent DMM for people into electronics. I paid around $125.00 16 years ago. Outside of a few worn traces on the rotary knob that I repaired, a couple burned resistors that was my fault, and a SMD IC which I replaced, the meter has been great. You can buy cheaper versions of my meter without the inductance feature for around $40 on Ebay.

[@CSSIandAssociate]

electronicsNmore There is one on EBAY at the moment $39.99

[@CSSIandAssociate]

hansley maharaj Hansley, there is one on Ebay at the moment for $39.99 Here is another good meter it is not RMS but a very good meter. www.harborfreight.com/5-in-1-digital-multimeter-98674.html I have one and sometimes you can get it for 49.99 I love the temp probe on it. I use that on the oven everytime I bake something....

[@anujpundir6537]

Sir plz make a video on IGBT testing and its working.

[@buddha65281]

hello, I hope you respond... does it matter what the input voltage is in regards to the forward output voltage? Also, does it matter what size resistor is used to trigger the gate? Thank you.. I did test mine and it appears to be forwarding .597v (T106D1). great video..

[@onefixitman]

The purpose of the resistor is to limit the current thru the gate circuit. I know it has been two years but I hope it helps

[@ke6bnl]

How do you determine what resister to activate the gate?

[@electronicsNmore]

Ed Ginsberg Hi Ed. If using an SCR for a 6v to 12V circuit, usually a 200 ohm to 1K ohm resistor will be just fine. You need to look up the data sheet for your SCR. The SCR in this video is a BT151-500R, which has a gate trigger current of around 15mA. If you go to trigger the SCR for a heavier load and you have triggering issues, then lower the gate resistor value until the problem is corrected. Thanks.

[@phyowailwin8124]

@@electronicsNmore Which resistor would you recommend to use if I want to trigger 12V coil relay with SCR(BTA41-600B) to run for 1/2 HP motor? Meaning, sensor will trigger SCR gate with apporate voltage(originally 12V DC) to activate the relay then relay will connect with 1/2 HP AC motor.

[@inibehealfred3932]

Appreciated

[@saarike]

Nice, thanks!

[@electronicsNmore]

You're welcome! Be sure to share and rate thumbs up. Thanks

[@saarike]

Sure! :)

[@daveh9474]

fire alarms...or any latching circuit

[@electronicsNmore]

Please look over my video playlists. I have a smoke activated relay and other alarms shown on my channel. Thanks for watching!

[@8290Wgu]

awesome bro

[@hafsabanu2621]

RELATED LINKS: www.test-and-measurement-world.com/Articles/SCR-Testing.html www.rfwireless-world.com/Terminology/SCR-vs-Diac-vs-Triac-vs-UJT.html

[@rolandgomes88]

Hi, a circuit diagram would be nice to understand it better

[@electronicsNmore]

Hello, the video contained more than enough information to duplicate what I did. All you need to do is identify the pins of your SCR, and you can find that out by searching online. Thanks for watching!

[@subbaraotirumani7787]

good

[@yudistra5455]

how code of SCR ?

[@electronicsNmore]

Look up the SCR# online.

[@ammaralyasiri4191]

where is the circuit diagram

[@electronicsNmore]

No circuit diagram for this video. I was simply showing how to test the SCR, and everything was very well explained in this video. Thanks for watching!

[@WV591]

clear demo and explanation. sub n tu

[@electronicsNmore]

Thanks! Be sure to share my channel with others and check out my extensive video playlists. I have many excellent videos.

[@ammarbasrah1362]

good videos but where the drewing?

[@electronicsNmore]

Most videos I have show schematics, but this video was explained in great detail, so no schematic is required. Thanks for watching!

[@ysl4765]

I thought the comment are full of Jojo fan

[@ysl4765]

Scr: silver chariot requiem

[@bingosunnoon9341]

Prepare your stuff in advance and rehearse.

[@electronicsNmore]

I never knew I was expected to upload these videos that help others.....

[@tatin5528]

domo

[@erickrisdatuin8663]

ULUL

[@sadotero2705]

Alumia Panot